The RxR Sourcing Program is a service provided by Keystone Pharmaceuticals, Inc. to help hospital, pharmacies, doctors, and clinics locate hard-to-find prescription drugs quickly and easily. It is the goal of our professional, friendly customer service department to source your prescription request within 24 to 48 hours. Keystone's RxR Sourcing program has formed the reliable networks needed to provide its customers with quality and efficient service. We are here to service all of your sourcing needs.